{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,2]],"date-time":"2026-08-02T22:08:10Z","timestamp":1785708490582,"version":"3.56.0"},"reference-count":15,"publisher":"BMJ","issue":"6","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Case Rep"],"accepted":{"date-parts":[[2020,3,17]]},"published-print":{"date-parts":[[2020,6]]},"abstract":"<jats:p>A 31-year-old woman with known Larsen syndrome presented with congenital chronic luxation of her right knee with increasing instability symptoms, which limited her daily activities. We refrained from a constrained knee arthroplasty due to her relatively young age and decided to perform a knee arthrodesis. Knee arthrodesis is a viable lifelong-lasting operative treatment alternative for specific instability-related knee disease. The knee arthrodesis was performed by double plating with an additional fixation of the patella. At 1-yearfollow-up, she was able to walk without limitations and did not experience any pain with complete consolidation of the arthrodesis. At 2-year follow-up, she performed all her daily activities without limitations. Both the Knee injury and Osteoarthritis Outcome Score (KOOS) and the International Knee Documentation Committee subjective knee form (IKDC) improved at 2-year follow-up (KOOS: 61.3; IKDC: 56.3) compared with 1-year follow-up (KOOS: 52; IKDC: 40.2).<\/jats:p>","DOI":"10.1136\/bcr-2019-232109","type":"journal-article","created":{"date-parts":[[2020,6,2]],"date-time":"2020-06-02T05:55:15Z","timestamp":1591077315000},"page":"e232109","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":3,"title":["Knee arthrodesis for a congenital luxation with Larsen syndrome"],"prefix":"10.1136","volume":"13","author":[{"given":"Mustafa","family":"Kaynak","sequence":"first","affiliation":[{"name":"Orthopaedic Surgery, Erasmus MC, Rotterdam, The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Duncan E","family":"Meuffels","sequence":"additional","affiliation":[{"name":"Orthopaedic Surgery, Erasmus MC, Rotterdam, The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"239","published-online":{"date-parts":[[2020,6,1]]},"reference":[{"key":"2025082804325270000_13.6.e232109.1","unstructured":"Robertson S . 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